Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08cacc6d358a51f…

MALICIOUS

PDF

80.3 KB Created: 2021-09-16 19:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e0ce63f0fe686f46b30379a71cb69b3c SHA-1: 0e22611818a9935528c54ed8b28e3f106e7833ff SHA-256: f08cacc6d358a51f74ddf2c18f32d39c6164f6e121559521e07fcb893ca2baf2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to disposable hosting, suggesting an attempt to redirect the user to malicious content. The presence of multiple unknown URLs indicates a likely distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5270c9bd8---7964816611.pdf In PDF document text
    • http://sl-light.ru/design/img/upload/file/67989319509.pdfIn PDF document text
    • http://intertribo.sk/files/10847264332.pdfIn PDF document text
    • http://jonellchem.com/upload/files/vuzanadajibezatejo.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/94034696834.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc6e76a662---zawadone.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/83722999414.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/nototawo.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/74991854293.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/75120242718.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/2204403924.pdfIn PDF document text
    • http://delve-cr.com/uploads/fifedibeputuporuzedekizuj.pdfIn PDF document text
    • http://benly-carson.com/product/files/zivesenowukidizudusame.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/41953293763.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/65635696762.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/4112015855.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/59842765543.pdfIn PDF document text
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/kivodidomolilomu.pdfIn PDF document text
    • https://htchninc.com/d/files/2790605320.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/44663526246.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64758470734.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/bukevunebumakabi.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/83285039924.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/71524204057.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/24756654680.pdfIn PDF document text
    • http://dentherapia.hu/files/file/63356736611.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/bijesafemepis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+second+class+citizen+by+emecheta+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD495 17320 bytes
SHA-256: 74fe0482cfda91c7e6bf8d3c4d2c15e9f9a6fa6eef61aad7714266e3daae86c3
font_01_sfnt_off00010168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10168 11184 bytes
SHA-256: 9bfc9c1d76cd9a69539a706029cf7a5f7b31e820a96b67a3f3ee3dbf5372e073
font_02_sfnt_off00011b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1